/Engine/Plugins/Runtime/Synthesis/Source/Synthesis/Classes/SynthComponents/SynthComponentMonoWaveTable.h
Set whether or not the Amp envelope's bias is inverted.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="Synth|Components|Audio") void SetAmpEnvelopeBiasInvert ( const bool bInBiasInvert )